Messages in this thread | | | Date | Tue, 14 Oct 2014 10:48:15 +0200 | From | Johan Hovold <> | Subject | Re: rotary encoder linux driver |
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On Sun, Oct 12, 2014 at 06:29:03PM -0700, tecfacet wrote: > Hello. > > I am interested in the rotary encoder kernel driver. I am very new to > this linux kernel driver thing. > > How do I pass the gpio and interrupt stuff to the kernel module.. I > think it is thru the rotary_encoder.h file.. am I correct?
That should be done through the device tree these days. The binding is documented in
Documentation/devicetree/bindings/input/rotary-encoder.txt
in the kernel source tree.
> How does the information about encoder position etc get back to my > user space program? How is debounce handled? > I am a little confused. Is there an example of a complete working > implementation? I need to figure this out for school.
Have a look at the evtest program for an example:
http://cgit.freedesktop.org/~whot/evtest
Good luck, Johan
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